Universal taper attachment.



W. SGHELLENBACH.

UNIVERSAL TAPER ATTACHMENT.

APPLIUATION FILED 0UT.28, 1912.

Patented July 8, 1913.

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00 m. J d e Lb n na DI W. SGHELLENBAGH. -TJTHVERSAL TAPER ATTACHMENT.APPLICATION FILED 00T.28, 1912.

TTT TMTNT WILLIAM SCHELENBACH, OIF lEI.AR/.lVlEl'lIay OHIO.

UNIVERSL TAPEE ATTACHMENT.

Specication of Letters Patent.

Application led ctober 28, 1912. Serial No. 728,321.

Patented July 8, 1913.

To all whom, t may concern:

Be it known that T, WILLIAM SCHELLEN- BACH, a citizen of the UmitedStates, residing zit-Hartwell, in the county of Hamilton and State ofOhio, have invented certain new and useful Improvements in UniversalTaper Attachments, of which the following is a specification.

This invention relates to improvements in means for turning tapers, andin a .more concrete sense it is concerned with an instrumentality thatmay be applied as an attachment, to an engine lathe to facilitate theproduction of tapers of various sizes and conforming to variousstandards.

One object within the contemplation of this invention is to renderavailable a taper forming mechanism of a relatively simple character andso adjustable a's to be in the nature of a universal instrument'enabling an operator without loss of time to set the sameforcuttingtapers within a wide an- V gular range.

forming to the'standard in which tapers Anc-ther object of thisinvention is to devise a compact'- arrangement in which, notwithstandingthe usel of a 'relatively short taper bar, it will be possible easily toout tapers of a length exceeding that of the taper bar. Y

AL stillifurther object is to render available a taper cuttingattachment for the carriage of such' a character that steep tapers maybe made with heavy cuts without imposing on "the carriage strainstending to twist-the same at an angle to the guides of the lathe bed andthus tend to develop inaccuracies in the work.

YAnother object is to provide an instrumentality of thecharacter speciedthat embodies simple and adjustable means wherebythe same may bequickly-set t-o cu't tapers accuratelyfconforming either to the'sta-ndard requiring a givenu number of inches or fractions thereof .perfoot, or accurately conare expressed in terms of degrees.

Another object isto create a simple taper cutting Aattachment applicablefor cutting long or short gradual tapers and equally applicableforcutting abrupt tapers.

@ther objects will be in part outlined in the following description andin part rendered apparent therefrom invco-nnection with the drawingshereto annexed. l

lin order that this invention may be made more readily comprehensible tothose skilled in this art, drawings illustrating one of the` j manypossible embodiments thereof have been appended asa part of thisdisclosure,

and in such drawings like characters of ref` erence denote correspondingparts throughout all t-he figures, of which Figure l represents a planView of a taper cutting attachment embodying the several features ofthis invention as applied tothe bed of a lathe. Fig. 2 is a partialhorizontal section taken along -line 2 2 of Fig. 4, showing thearrangement of a micrometer adjustment, such as may be used for movingthe taper bar accurately into any predetermined position. Fig. 3 is asection taken along line 3-3 of Fig. l, showing further details of thisarrangement, and Fig. 4 is a section taken along line i-ll of F ig. 3,showing other details.

Continuing now by way of amore complete disclosure of the underlyingprinciples and features of this invention, it may stated that thedescription, while dealing largely with specific features is to be takenin -an illustrative or explanatory Sense, rather than ina limitingsense, inasmuch as the features of the invention mayassumedifferentforms from that shown, as will be readily comprehended .by those skilledin the art in the light of this disclosure.

It will r`suffice to show this mechanism in connection with certainparts of an engine lathe, without entering intol a detailed descriptionof the conventional lathe elements.

The bed of the lathe,ihavingvthe usual guidel Ways formed thereon, isindicated by l, and slidably arranged in al suitable manner on suchguideways is a base 2 of the tool carriage. This base provides a transverseslide 3 in which is mounted the part et that in turn, through aconventional tool post arrangement, carries the cutting tool 5. The

4part 4; has a depending lug 6, through which passes thescrew-threadedshaft 7 forming a `feed screw that terminates ,in an operating handle 8.It will be understood that as the work carried by the spindle of thehead stock revolves through a suitable lead screw, the base 2 f thecarriage is caused to slide longitudinally on the ways offthe lathe bed.During a hand operation, the screw 7 is rotated without translating, andduring an auto-matic operation it is translated without,

rotating. Fixed to the rear of theA carriage base 2 isa casting 9 havinglugs 10 through which. pass the boltsv 1l, holding the same guide wav 12extending parallel with the guides ofithe lathe bed.

The traveling support for. the taper barA consists of a member 13 thathas a dovevmany inches per foot.

tailed portion 14 interfitting with the slide 12, and it extendsforwardly, and has fixed thereto a rack 15v by means of the screw 16.This rack is used either .whenAshortsteep tapers or long gradual tapersare to be cut, as presently will be described. Pivoted at its center tothe member 13 by means of a pivot pin 17 is a taper bar 18. This taperbar is shown adapted to be swungV in either direction through an angleof about fifteen degrees from a position parallel with the lathe bedguides, and means are provided whereby the angular position of thistaper bar may be determined either in degrees or according to thestandard expressed in so hand end of the member 13 is'a scale 19 that isarranged in the arc of a circle with the pivot pin 17 at its center, andthisscale denotes degrees, so that the taper bar 18 may4 be swung aboutto bring a suitable mark thereon in coincidence with any of thedivisions of the scale, and thus insure a predetermined angularity ofthe taper bar expressed in degrees with respect to the guides of the?lat-he. This scale 19 has its zero line at a position such that it willcoincide with the mark on the taper bar 18 when the lat-ter is' exactlyparallel with the guidesfof the lathe bed, and from this point the scalereads in both directions.

At the oppositeend of the taper bar there is arranged on the member 13 ascale 20 that indicates the taper in inches and fractions thereof perlinear foot along the center-line of the lat-he. This scale is setperpendicularly to the guides of the lathe bed, and projecting from theextremity of the taper bar is an indicator or finger 21. This finger,as' shown more clearly by Fig. 4, is springpressed, so as always tocontact with the 'edge of the scale 20 (t. e. at the ends of thedivisions) irrespective ofthe angular position of the taper bar 18. Bythis means, the

operator is enabled to shift the taper liar to bring the finger 21opposite any one of the gradations on the scale, say 1% inches from thecenter line, and the taper bar will therefore'slant at an anglemeasuredin terms of 1% inchesto the foot. To lock the taper bar in itsangular position,after being set, the clampk nuts 22 and 23 areprovided, and to enable the operatr to have a more sensitive con-trol inpositioning the taper bar, the mlcrometer screw 24 may be utilized. Thiswill be understood more clearly by referring to Fig. 2 in which 25indicates a segmental rack xed to the taper bar by means of theVrelative movements therebetween.

Thus, at theleft bolt 23. A worm 26 controlled by the micrometer screwdetermines the position of the rack, and a spring-pressed detent 27 maybe used to hold thev worm of micrometer screw against the teeth of therack to take up back-lash and wear. \The parts thus described inconnection with the taper bar and the mounting therefor, will, when usedin cutting gradual tapers not longer than the taper bar, be heldstationary so that the carriage, together with the cast-ing 9, will movelongitudinally with respect to the same. To hold suchparts stationary, abracket 28 extends from the lathe bed andmay be locked against movementthereon by means of the hand clamp 29. A bar 30 extends from the member13 tothe bracket 28, and prevents It will shortly be explained that whenshort abrupt tapers or gradual tapers longer than the taleased, so thatthe member 13 may be caused to travel at a rate different from that ofthe carriage.

Bolted to the casting 9 isa top plate 31 inf which normally slides amember 32 that has ajdepending lug 33, to which is rotatably secured theend of the feed screw 7. Pivoted to;` .this member, 32 by means of apivot pin 17', is a slide block' 34 that ,slides on thev taper bar 18.Thus, when the carriage feeds along the lathe bed guides, if the taperbar 18 is held stationary, or travels faster or slower, the block 34will slide therealong, and be moved in or out according to the relationexisting between the angular position of the taper bar and its movementwith respectV to the carriage. This results in a corresponding movementof the feed screivvr 7 and carries the tool into or out of the work at arate correspondingto the setting of the taper bar18. Should it bedesired to move thel tool by hand the bracket 28 is freed from the lathebed, and, the clamp nut 35 is tightened to prevent the block 32 fromsliding, thus holding the feed screw 7 against translation andpermitting it to be rot-ated by hand, so as to feed the tool as desired.

It will be observed that when the taper bar is `locked to the lathe bed,-it may'only be used to cut tapers equal in length to that of the taperbarand having a maximum slope of about fifteen degrees from-the axis,but should it be desired to cut steeper tapers of a shorter length, orgradual tapers of a greater length, the bracket 28 is freed by means ofthe handle 29, and gearing is used to cause the taper bar and itssupporting member 1,3 to travel faster or slower than the carriage. Tothis end, there is in the apron of the carriage a gear 36 that receivesmotion from the,leadscrew or rack in a suitable'4 manner. This gear isloosely journaled on a shaft 37, but by means of a clutch 38 actuatedthrough the part 39, it may be iso mei/,187

.locked to such shaft. This enables gear 40 to. berevolvedanddn-turnrotates gear 41' and the shaft ll2,extemiling throughthe base.

ofthe carriage and terminating ina gear 4,3

that meshes with. rack 15, The gears .40 and 41 are replaceable byothers so. as to enable' .the speed ratio .to be. varied to' any extentdesired. Now, when gear 43 is positively driven by tbe-means. abovespecified, 1t is evident that ral 15 will be moved relatively to thecarriage, either fasterior'slower as the: c ase may be, and'vca-rry withVit the.=membe1. For L It will thus be perceived that this invention,although of a simple character, is well adapted to achieve the objectsand ends aforesaid. It will be understood that. the same may be subjectto considerable rearrangement and that certain parts may be usedwithoutvothers, without departing from the spirit of the various aspectsof this invention. y

l therefore claim as my invention and desire to secure by Letters Patentof the United States :--v

1. A mechanism of the nature disclosed combining a bed, propelling meanson one side thereon the ltraveling carriage, a tool post movable on saidcarriage, a member located remote from said propelling means adapted tobe moved relative to said carriage,'means connecting said tool post withsaid member, and `means operative through said carriage from saidpropellin means for moving said member at a. ratev di erent from v thatof said carriage when the latter travels, whereby'said tool post may bemoved on said carriage.

2. A mechanism of the nature, disclosed 'combining a travelingcarriage,'a tool post movable on said carriage transversely' to itsdirection of travel, a member at the rear o said carriage movable in thedirection of travel ofy .said carriage and havinga slideway disposed atan angle to the direction of" travel, means connecting said tool postwith said slide-way whereby the former may be moved by the latter, andmeans extending rearwardly to said member from the yapron of saidcarriage for moving said member ata rate diierent from that of thetraveling carriage.

3..A mechanismiof the nature disclosedcombining ajbed having 4a racktraveling carriage, a tool post movable thereon, a member movable onsaid carrlage 1n a direction of travel thereof, an angularly adJulst-.nectedwith the latter in -able bar oni said member,..at connectionbetweenfthe tool post and said .bar whereby the ,latter may control theposition of the former, means mounted on said carriage and interveningbetween said rack and member for. moving said member ata rate dilerentfrom. tha-trofl said traveling carriage, and means for, translating saidlcarriage and conclose. proximity with' said rack.

A'. A mechanism of the nature disclosed' combining a traveling carriage,a tool post -movable -transversely thereon, a ymember vmounted` on saidcarriage .to slide. thereon transversely' with the movement of said toolpost, a bar angularly adjustable' on said Lmember, connections betweensaid bar and tool post, a shaft journaled transversely in said carriageand geared t`o said member,

means adapted to be engaged with said shaft to move said member at apredetermined rate different from that ofsaid traveling car-- riage,means adapted to cause said member to move as unit with said carriage,and means adapted to be engagedto hold said member stationary during thetravel of said carriage.

5. A mechanism of the nature disclosed combining a traveling carriage, amemberl slidably mounted thereon and having a rack, a speed changegearing operative "through said carriage and connected with said rack tomove'said member relatively to said carriage, a bar adapted to beadjusted angularly onsaid member, a tool post slidable on loo' saidcarriage, and a'connection extending from said tool post into afslidingengagement with said bar, whereby said tool post may be moved at a ratedeterminedby the angularity of said bar and the rate of movement of saidmember relative to said carriage.

6. A mechanism of the nature. disclosed combining a. traveling carriage,clutch oontrolled gearing'mounted at the apron of said carriage andadapted to be drivenv at a rate corresponding to or proportionate withVthe rate oft-ravel yof said carriage, a shaft ex-v 7 'i tendingfrom'said gearing' transversely to' the rear. of said carriage andterminating in a gear, a member slidably mounted at 'the rear of saidcarriage and having a rack meshingwith said gear, a bar pivoted to saidmember and, adjustable angularly thereon, a tool post movable on saidcarriage, and connection extending from said -tool post and terminating'in a sliding fit with said bar. Y

' 7. A mechanism of the nature disclosed combining'a guide bed, atraveling carriage thereon, a member slidably mounted on said carriage",gearingextendingfromsaid guide bed through said carriage to said memberto move the latter atJ a rate proportionate tothe travel 4of saidcarriaga'a bar angularly adjustable on said member, a, tool postymovable on said carriage, and means for enabling said bar to determinethe position of said-tool post. 1

8. A mechanism of the nature disclosed combining a guide bed having arack, a carriage traveling thereon, a member slidably mounted on saidcarriage and also having a rack, gearing mounted on said carriage and inmesh with each of said racks; a tool "post movable von said carriage,andv meanslfor enabling the movement of said member relative'to saidcarriage to determine the rate of movement of said tool post on saidcarriage.. A

9. A mechanism of the nature disclosed' combining a traveling carriage,a tool post movable thereon, a pivoted slide-bar adapted to be angled, ascale loca-ted at one end spaced graduations `terminating *atV saidstraight edge, means carriedby the end of said. plvoted` bar coperatingwith the stralght edge of said scale to enable'the center line of saidpivotedbar to be interseetedu with any of said graduations at saidstraight edge, and means connecting said -tool part with said barwhereby the position of the former may be controlled by the latter. l

In testimony my hand.

`W'ILLIAM SCHELLENBACH. Witnesses:

OLIVER B. KAISER,l

CLARENCE B. FOSTER.

whereof, I have hereunto set

